/*************************************************************************** Jump Bug memory map (preliminary) 0000-3fff ROM 4000-47ff RAM 4800-4bff Video RAM 4c00-4fff mirror address for video RAM 5000-50ff Object RAM 5000-503f screen attributes 5040-505f sprites 5060-507f bullets? 5080-50ff unused? 8000-afff ROM read: 6000 IN0 6800 IN1 7000 IN2 ? * * IN0 (all bits are inverted) * bit 7 : DOWN player 1 * bit 6 : UP player 1 * bit 5 : ? * bit 4 : SHOOT player 1 * bit 3 : LEFT player 1 * bit 2 : RIGHT player 1 * bit 1 : DOWN player 2 * bit 0 : COIN A * * IN1 (bits 2-7 are inverted) * bit 7 : UP player 2 * bit 6 : Difficulty: 1 Easy, 0 Hard (according to JBE v0.5) * bit 5 : COIN B * bit 4 : SHOOT player 2 * bit 3 : LEFT player 2 * bit 2 : RIGHT player 2 * bit 1 : START 2 player * bit 0 : START 1 player * * DSW (all bits are inverted) * bit 7 : ? * bit 6 : ? * bit 5 : ? * bit 4 : ? * bit 3 : \ coins: 11; coin a 1 credit, coin b 6 credits * bit 2 : / 10; coin a 1/2 credits, coin b 3 credits credits 01; coin a 1/2 credits, coin b 1/2 00; coin a 1 credit, coin b 1 credit * bit 1 : \ lives: 11; 5 cars, 10; 4 cars, * bit 0 : / 01; 3 cars, 00; Free Play write: 5800 8910 write port 5900 8910 control port 6002-6006 gfx bank select - see vidhrdw/jumpbug.c for details (6005 seems to be unused) 7001 interrupt enable 7002 coin counter ???? 7003 ? 7004 stars on (?) 7005 ? 7006 screen vertical flip ???? 7007 screen horizontal flip ???? 7800 watchdog reset ***************************************************************************/ #include "driver.h" #include "vidhrdw/generic.h" #include "sndhrdw/8910intf.h" extern unsigned char *jumpbug_attributesram; extern unsigned char *jumpbug_gfxbank; extern unsigned char *jumpbug_stars; extern void jumpbug_vh_convert_color_prom(unsigned char *palette, unsigned char *colortable,const unsigned char *color_prom); extern void jumpbug_attributes_w(int offset,int data); extern void jumpbug_gfxbank_w(int offset,int data); extern void jumpbug_stars_w(int offset,int data); extern int jumpbug_vh_start(void); extern void jumpbug_vh_screenrefresh(struct osd_bitmap *bitmap); extern int jumpbug_sh_start(void); static struct MemoryReadAddress readmem[] = { { 0x4000, 0x4bff, MRA_RAM }, /* RAM, Video RAM */ { 0x4c00, 0x4fff, videoram_r }, /* mirror address for Video RAM*/ { 0x5000, 0x507f, MRA_RAM }, /* screen attributes, sprites */ { 0x0000, 0x3fff, MRA_ROM }, { 0x8000, 0xafff, MRA_ROM }, { 0x6000, 0x6000, input_port_0_r }, /* IN0 */ { 0x6800, 0x6800, input_port_1_r }, /* IN1 */ { 0x7000, 0x7000, input_port_2_r }, /* IN2 */ { 0xeff0, 0xefff, MRA_RAM }, { -1 } /* end of table */ }; static struct MemoryWriteAddress writemem[] = { { 0x4000, 0x47ff, MWA_RAM }, { 0x4800, 0x4bff, videoram_w, &videoram, &videoram_size }, { 0x4c00, 0x4fff, videoram_w }, /* mirror address for Video RAM */ { 0x5000, 0x503f, jumpbug_attributes_w, &jumpbug_attributesram }, { 0x5040, 0x505f, MWA_RAM, &spriteram, &spriteram_size }, { 0x7001, 0x7001, interrupt_enable_w }, { 0x7004, 0x7004, MWA_RAM, &jumpbug_stars }, { 0x6002, 0x6006, jumpbug_gfxbank_w, &jumpbug_gfxbank }, { 0x5900, 0x5900, AY8910_control_port_0_w }, { 0x5800, 0x5800, AY8910_write_port_0_w }, { 0x7800, 0x7800, MWA_NOP }, { 0xeff0, 0xefff, MWA_RAM }, { 0x0000, 0x3fff, MWA_ROM }, { 0x8000, 0xafff, MWA_ROM }, { -1 } /* end of table */ }; static struct InputPort input_ports[] = { { /* IN0 */ 0x00, { 0, 0, OSD_KEY_LEFT, OSD_KEY_RIGHT, OSD_KEY_CONTROL, OSD_KEY_ALT, OSD_KEY_DOWN, OSD_KEY_UP }, { 0, 0, OSD_JOY_LEFT, OSD_JOY_RIGHT, OSD_JOY_FIRE1, OSD_JOY_FIRE2, OSD_JOY_DOWN, OSD_JOY_UP } }, { /* IN1 */ 0x40, { OSD_KEY_1, OSD_KEY_2, 0, 0, 0, OSD_KEY_3, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 } }, { /* DSW */ 0x01, { 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 } }, { -1 } /* end of table */ }; static struct TrakPort trak_ports[] = { { -1 } }; static struct KEYSet keys[] = { { 0, 7, "MOVE UP" }, { 0, 2, "MOVE LEFT" }, { 0, 3, "MOVE RIGHT" }, { 0, 6, "MOVE DOWN" }, { 0, 4, "FIRE" }, { 0, 5, "JUMP" }, { -1 } }; static struct DSW dsw[] = { { 2, 0x03, "LIVES", { "UNLIMITED", "3", "4", "5" } }, { 1, 0x40, "DIFFICULTY", { "HARD", "EASY" }, 1 }, { -1 } }; static struct GfxLayout charlayout = { 8,8, /* 8*8 characters */ 768, /* 768 characters */ 2, /* 2 bits per pixel */ { 0, 768*8*8 }, /* the two bitplanes are separated */ { 7*8, 6*8, 5*8, 4*8, 3*8, 2*8, 1*8, 0*8 }, { 0, 1, 2, 3, 4, 5, 6, 7 }, 8*8 /* every char takes 8 consecutive bytes */ }; static struct GfxLayout spritelayout = { 16,16, /* 16*16 sprites */ 192, /* 192 sprites */ 2, /* 2 bits per pixel */ { 0, 192*16*16 }, /* the two bitplanes are separated */ { 23*8, 22*8, 21*8, 20*8, 19*8, 18*8, 17*8, 16*8, 7*8, 6*8, 5*8, 4*8, 3*8, 2*8, 1*8, 0*8 }, { 0, 1, 2, 3, 4, 5, 6, 7, 8*8+0, 8*8+1, 8*8+2, 8*8+3, 8*8+4, 8*8+5, 8*8+6, 8*8+7 }, 32*8 /* every sprite takes 32 consecutive bytes */ }; static struct GfxDecodeInfo gfxdecodeinfo[] = { { 1, 0x0000, &charlayout, 0, 8 }, { 1, 0x0000, &spritelayout, 0, 8 }, { -1 } /* end of array */ }; static unsigned char color_prom[] = { /* palette */ 0x00,0x17,0xC7,0xF6,0x00,0x17,0xC0,0x3F,0x00,0x07,0xC0,0x3F,0x00,0xC0,0xC4,0x07, 0x00,0xC7,0x31,0x17,0x00,0x31,0xC7,0x3F,0x00,0xF6,0x07,0xF0,0x00,0x3F,0x07,0xC4 }; static struct MachineDriver machine_driver = { /* basic machine hardware */ { { CPU_Z80, 3072000, /* 3.072 Mhz */ 0, readmem,writemem,0,0, nmi_interrupt,1 } }, 60, 0, /* video hardware */ 32*8, 32*8, { 2*8, 30*8-1, 0*8, 32*8-1 }, gfxdecodeinfo, 32+64, 32, /* 32 for the characters, 64 for the stars */ jumpbug_vh_convert_color_prom, 0, jumpbug_vh_start, generic_vh_stop, jumpbug_vh_screenrefresh, /* sound hardware */ 0, 0, jumpbug_sh_start, AY8910_sh_stop, AY8910_sh_update }; /*************************************************************************** Game driver(s) ***************************************************************************/ ROM_START( jumpbug_rom ) ROM_REGION(0x10000) /* 64k for code */ ROM_LOAD( "jb1", 0x0000, 0x1000 ) ROM_LOAD( "jb2", 0x1000, 0x1000 ) ROM_LOAD( "jb3", 0x2000, 0x1000 ) ROM_LOAD( "jb4", 0x3000, 0x1000 ) ROM_LOAD( "jb5", 0x8000, 0x1000 ) ROM_LOAD( "jb6", 0x9000, 0x1000 ) ROM_LOAD( "jb7", 0xa000, 0x1000 ) ROM_REGION(0x3000) /* temporary space for graphics (disposed after conversion) */ ROM_LOAD( "jbi", 0x0000, 0x0800 ) ROM_LOAD( "jbj", 0x0800, 0x0800 ) ROM_LOAD( "jbk", 0x1000, 0x0800 ) ROM_LOAD( "jbl", 0x1800, 0x0800 ) ROM_LOAD( "jbm", 0x2000, 0x0800 ) ROM_LOAD( "jbn", 0x2800, 0x0800 ) ROM_END ROM_START( jbugsega_rom ) ROM_REGION(0x10000) /* 64k for code */ ROM_LOAD( "jb1.prg", 0x0000, 0x4000 ) ROM_LOAD( "jb2.prg", 0x8000, 0x2800 ) ROM_REGION(0x3000) /* temporary space for graphics (disposed after conversion) */ ROM_LOAD( "jb3.gfx", 0x0000, 0x3000 ) ROM_END static void jumpbug_decode(void) { /* this is not a "decryption", it is just a protection removal */ RAM[0x265a] = 0xc9; RAM[0x8a16] = 0xc9; RAM[0x8dae] = 0xc9; RAM[0x8dbe] = 0xc3; RAM[0x8dd7] = 0x18; RAM[0x9f3d] = 0x18; RAM[0x9f53] = 0xc3; } struct GameDriver jumpbug_driver = { "Jump Bug", "jumpbug", "RICHARD DAVIES\nBRAD OLIVER\nNICOLA SALMORIA", &machine_driver, jumpbug_rom, jumpbug_decode, 0, 0, input_ports, trak_ports, dsw, keys, color_prom, 0, 0, 8*13, 8*16, 0, 0 }; struct GameDriver jbugsega_driver = { "Jump Bug (bootleg)", "jbugsega", "RICHARD DAVIES\nBRAD OLIVER\nNICOLA SALMORIA", &machine_driver, jbugsega_rom, 0, 0, 0, input_ports, trak_ports, dsw, keys, color_prom, 0, 0, 8*13, 8*16, 0, 0 };